<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31412787</termId><termName>sardonyx</termName><termType>PT</termType><termNote><![CDATA[ A gem variety of chalcedony with parallel layers of sard and a mineral of another color. ]]></termNote><termCreatedDate>2026-03-30 20:50:59</termCreatedDate><relation><relationType>BT</relationType><termId>31412209</termId><termName>onyx</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31376754</termId><termName>gemstones by specific type</termName><termType>PT</termType></relation></term>  </Zthes>